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Title |
Investigations of Vulnerable Members and Collapse Risk for System Support Based on Damage Scenarios
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Authors |
박세인(Sae In Park) ; 박주현(Ju-Hyun Park) ; 안효준(Hyojoon An) ; 이종한(Jong-Han Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.1.33 |
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Keywords |
시스템 동바리; 손상 시나리오; 임계하중; 취약부재 System support; damage scenario; critical load; vulnerable member |
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Abstract |
In recent years, many construction projects become large and complicated, and construction accidents also steadily increase, which grows interest in the safety and maintenance during construction. Many of the construction accidents are related to temporary construction and structures, but the safety evaluation and management during construction are unclear and indefinite due to the short operating period and continuous change in the formation of the temporary structure. The system support, which is one of the temporary structures to support the pouring load of concrete, was proposed to easily install and dismantle members with connection parts pre-manufactured. The use of the system support is increasing to improve the safety of the temporary structure during construction. However, the system support, which consists of multiple members, still has uncertainties in connectivity between members and supports of vertical members. Therefore, this study analyzed the structure, load, and accident cases of the system support to define the damage scenarios for member connection, support condition, and lateral displacement. The decrease rate of the critical load was analyzed according to the damage scenarios based on the defined unit structure of the system support. In addition, this study provided vulnerable members for each damage scenario, which could induce instability of the temporary structures during design, construction, and operation of the structure.
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